Sylvania



J. H. YOUNG.

PROTECTED METAL ARTICLE. APPLICATION FILED FEB. 27, 1920.

1,866,999; Patented Feb. 1,1921.

ANG-stick Materi HarcL Asphalt.

-S0'F't Asphalt -l letal.

7 9342a ai-43,.

UNITED STATES. PATENT OFFICE.

JAMES HOWARD YOUNG, OF PITTSBURGH, PENNSYLVANIA, ASSIGNOR TO K. H. ROBERTSON 00., OF PITTSBURGH, PENNSYLVANIA, A CORPORATION 01: PENN- SYLVAN IA.

PROTECTED IIETAL ARTICLE.

' Specification of Letters Patent.

Patented Feb. 1, 1921.

, Application filed Februery'27, 1:920. serial No, 361,725.

To all whomitwmy concern; Be it known that I, 'JAnrns I'IOWARD YOUNG, a citizen of the United- States, residin in Pittsburgh, county of Alleghe y; and tate. of Pennsylvania, have invented an Improvement in Protected Metal Articles, of which the following description, in connection with the accompanyin drawings, is a specification, like letters on t e drawing re resenting like parts.

his invention relates to a rotected metal article particularly adapte for building purposes and which will be hereinafterreferred to as a protected metal sheet.

The invention has for.- its object to provide a protected metal sheet, which is capable of resisting weather conditions and acid and alkaline fumes, and which can be produced at such low cost as to enable it to be used in those places where heretofore only galvanized iron was available on account of the cost.

To this end, the metal sheet is provided, preferably on all of its surfaces and edges, with a coating composed of a layer of relatively low meltin point asphalt, which will i be hereinafter re erred to as a soft asphalt,

which is applied to the steel or other metal sheet, and a second layer of relatively hlgh melting point asphalt, which will be'hereinafter referred to as hard asphalt, is applied to the first layer and bonds therewith. The coated metal sheetmay and prefer ably will be provided with an exterior layer of anti-stick material.

The particular features-of the invention will be pointed out in the claims at the end of this specification. Figure 1 is .a plan of a portion of a protected metal sheet embodying this invention, and

Fig. 2, a cross section on the line 2--2,

fieferring to the drawings, a represents a metal sheet or other article, which is cleaned in the usual manner and has applied to it a soft asphalt or bituminous material of relatively low melting point to form a layerv b of substantial thickness.

The layer 6 may be formed on the metal sheet a by passing the latter through a bath of melted asphalt or betweenrolls supplied with hot asphalt in a manner well understood.

After the layer bof soft asphalt has been formed on the metal sheet a, a second layer '0 of relatively hard asphalt or like bituminous material of relatively high melting point is applied to the layer 1) while the latter is in more or less tacky condition, so that the second layer 0 will bond or unite with the first layer bl The protected metal sheet thus roduced, is especially advantageous for buil 'ng purposes, as the. metal sheet is efi'ectively protected against the action of the weather and acid and alkali fumes by the two layers of asphalt and particularly by the layer b of soft asphalt, while the layer 0 of relatively hard asphalt protects the layer 6 and is of sufiicient hardness to enable the coated sheet to behandled and worked in the warm temperaturesof the summer.

By the mixing of the outer surface of the layer 6 withv the inner surface of the layer 0, the two asphalt layers are directly bonded together so that'one modifies the other to such extent as to form a protective coating capable of resisting relatively wide changes in temperature, whereb the coating under the high temperatures 0 the summer months retains its hardness sufficiently to be handled, and under the low tem eratures of the winter months retains su cient ductility to void' becoming brittle and cracked.

These advantageous features enable the protected metal sheet to be manufactured and used all the year around, and bent or otherwise manipulated without injuring the protective coating.

Furthermore the protected metal sheet can be produced at a less cost than galvanized iron and consequently can be used where the latter only is now available on account of cost, and it is superior to galvamzed iron 1. As an improved article of manufacture,

a metal article provided with a protective coating, comprising a layer of bituminous material of relatively low melting point 'aflixed directly to the metal article, and a second layer of bituminous material of relatively higher melting point applied directly to and'united with thefirst-mentioned layer.

. soft asphalt layer.

3. As an improved article of manufacture. a metal article provided with a protective coating, comprising a layer of relatively soft asphalt aflixed to the metal article, a layer of relatively harder asphalt applied directly to and united with said relatively soft asphalt layer, and a film of anti-stick matefial covering the relatively harder asphalt ayer.

4. As an improved article of manufacture, a metal article enveloped by a weather and acid resisting coating composed of a layer of material capable of resisting relatively high .tempertures. and a layer of material capable o resisting relatively low temperatures, said latter layer being applied di- ;"ectly to said metal article and being directly bonded with thefirst-mentioned layer.

In testimony whereof I have signed my name to this specification.

JAMES HOWARD YOUNG. 

